No. 490] 



NOTES AND LITERATURE 



665 



Dr. J. F. Gudernatsch of the University of Czernowitz exhibited 

 sections of taste buds in the dugong. In the back part of the tongue 

 there are certain large glands, the ducts of which expand into cup- 

 shaped cavities near their oudets. In one of these cups there may be 

 two or three elevations pitted with taste buds. The taste buds also 

 occur occasionally along the deeper portion of the ducts. There are 

 no vallate papillae, and no taste buds are found in connection with the 

 small form of lingual glands. In the three orders of aquatic iiiaininnls 

 taste buds are either absent, as in Cetacea, or they an- ik.i well ,1, sl- 

 oped, as in the Pinnipedia and Sirenia. 



Professor S. Apathy of the University at Klausciil.iirir, Ilun-^ny, 

 showed three series of cytological pre})ar;iti()n.s. and il(iii(m>ir.,it'(l 

 some ingenious devices used in making them. The jH rfci iion nf hi^ 

 technique, as well as the nature of the spcciuiciis. made tlii> one of ihr 

 most notable exhibits. The first series of slides was pio.hiccd by an 

 unintentional experiment on living muscle nuclei of the leech Poiitob- 

 della, and showed important features of nuclear structure. The 

 experiment consisted in injecting corrosive sublimate between the 

 muscle layers of the intestine, instead of into the intestinal cavity, as 

 was intended. The introduction of the cannula caused the nuclei 

 to be compressed at one end and stretched at the other; in this con- 

 dition they were immediately fixed by the reagent. In the normal 

 nuclei the chromatin is arrange<l in coarse Tuasses or knots at the 

 angles of the nuclear network. In the stretclied luicici the tietwork 



resting nueletis may c.ti.iM uf bundles of intefla. ini,' l.nt iinbianclie.l 

 fibrils. At the same time the ehn.inatin knots were shown to he 



ently disai.peaved by lieconiiiii: exvnly .hstrihuied alonu- the fih'ri!.. 



